SH7147 Datasheet, PDF (844/1108 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 20 Flash Memory
(1) Download Control
The on-chip program is automatically downloaded by setting the SCO bit to 1. The on-chip RAM
area to be downloaded is the 3-Kbyte area starting from the start address specified by FTDAR. For
the address map of the on-chip RAM, see figure 20.10.
The download control is set by using the programming/erasing interface registers. The return
value is given by the DPFR parameter.
• Download pass/fail result parameter (DPFR: one byte of start address of on-chip RAM
specified by FTDAR)
This parameter indicates the return value of the download result. The value of this parameter
can be used to determine if downloading is executed or not. Since the confirmation whether the
SCO bit is set to 1 is difficult, the certain determination must be performed by setting one byte
of the start address of the on-chip RAM area specified by FTDAR to a value other than the
return value of download (for example, H'FF) before the download start (before setting the
SCO bit to 1). For the checking method of download results, see section 20.5.2 (2),
Programming Procedure in User Program Mode.
Bit: 7
-
Initial value: -
R/W: R/W
6
-
-
R/W
5
-
-
R/W
4
-
-
R/W
3
-
-
R/W
2
SS
-
R/W
1
FK
-
R/W
0
SF
-
R/W
Bit
7 to 3
Initial
Bit Name Value
R/W
⎯
Undefined R/W
2
SS
Undefined R/W
Description
Unused
Return 0.
Source Select Error Detect
The on-chip program which can be downloaded can be
specified as only one type. When more than two types
of the program are selected, the program is not
selected, or the program is selected without mapping,
an error occurs.
0: Download program can be selected normally
1: Download error occurs (Multi-selection or program
which is not mapped is selected)
Rev. 3.00 Oct. 06, 2008 Page 820 of 1080
REJ09B0230-0300